Write functional negative tests for testing actions with Chassis

[Sergii Turivnyi]

Negative tests for testing actions with Chassis.

Ironic client should be prepared for writing tests.
Then tests package should be written for client.

Negative tests for the Ironic CLI commands which checks actions with
chassis command like show, update, delete using either with arguments
or without arguments.

Test-cases for pyhton-ironicclient

test_chassis_delete_without_arguments
test_chassis_delete_with_incorrect_chassis_uuid
test_chassis_show_without_arguments
test_chassis_show_with_incorrect_chassis_uuid
test_chassis_update_without_arguments
test_chassis_update_with_incorrect_chassis_uuid